Dumping device



March 4: 19240 1,485,63H

Y W. C. SHEA DUMPING DEVICE Filed March 29. 1922 Patented Mar. 41, I924.

WILLIAM C. SHEA, OF PETALUMA, CALIFORNIA.

DUMPING DEVICE.

Application filed March 29, 1922. Serial No. 547,721.

To all whom it may concern:

Be it known that I, WILLIAM C. SHEA, a citizen of the United States, anda resident of Petaluma, county of Sonoma, and State of California, haveinvented a new and useful Dumping Device, of which the following is aspecification.

The present invention relates to improvements in dumping devices and isintended to be used principally in connection with trucks having bodiesor boxes adapted to dump their load, such as gravel for instance, onbeing lifted at one end. It frequently happens in dumping devices ofthis character that even though the front end of the body or box islifted a portion of the load will stick to the bottom and to the sidesand the edges of the box, and has to be removed by auxiliary means. Ifthis remaining portion of the load is removed by hand with the aid ofsuch tools as may be at the disposal of the operator it takesconsiderable time, and thereby detracts substantially from theadvantages gained by the use of an automatic dumping device. It is theobject of the present invention to provide auxiliary means for a box ofthe character described which will clean the same thoroughly during thedumping operation.

With this object in view I have illustrated the preferred form of myinvention in the accompanying drawing, in which Figure 1 shows a sideelevation of the rear end of a truck having a box thereon adapted to belifted at the front end and having my device attached thereto; Figure 2a similar view of the same truck showing my device in a slightlymodified form; Figure 3 a perspective detail view of my device; Figure 4a sectional detail view of a drum and its driving means; Figure 5 a sideelevation of the same, and Figure 6 a perspective detail view of mydevice in the modified form used in Figure 2.

The body of the box 1) is shown in the drawing as resting on the frame(2), the rear end of which is pivotally secured to the main frame (3) asshown at (4). In front of the box there is supported on the main frame(3) a suitable means for lifting the front end of the box when it isdesired to unload the same. This means is shown in the drawing ascomprising a hydraulic ram (6), the plunger (7 of which carries a pulley(8) over which is passed a cable (9), one end of which is secured to theframe of the ram while the other end is led underneath the body andsecured to the underside of its supporting frame (2) in any suitablemanner, as for instance, by the bracket (11). The device thus fardescribed is commonly used at the present time and no novel features areclaimed on the same. Its operation will be easily understood. \Vhen theplunger (7) is forced upward the cable (9) will lift the front end ofthe box and the loose gravel within the box will slide out of the samerearwardly, a hinged rear gate (12) opening at-the same time.

My attachment in its principal features comprises a scraper (13) and asupport 14) hingedly connected thereto, as at (16), and pivotallysupported above the box as at (17) so as to allow the scraper (13) toplunge forward when the front end of the box is lifted sufficientlyhigh, and to thereby thoroughly clean the box. The scraper is shown inthe drawing as consisting of a plate co-extensive in width with the boxand lying flat on the bottom of the same normally close to its rearedge. The support (14) is also preferably made of a plate co-extensivewith the width of the box so as to scrape the sides of the same whenplunging forward. In the form shown in Figure 3 the plate (14) ispivotally supported on a horizontal rod (17) mounted above the boxbetween two standards (18). The plates (13) and (14) are hingedlyconnected to each other so that the hinge normally lies against the rearedge of the box. Springs (19) are introduced tending to force the platesapart so that the whole device tends to straighten out as the plate (13)plunges forward.

Special means are provided for the return of the scraper to its originalposition when the front end of the box is lowered again. These meanscomprise a cable (21) having one end attached to an eye (22) secured tothe scraper near the hinge and having its other end fastened to a drum(23) adapted to be actuated by a gear wheel (24) supported co-axiallywith the drum in brackets (26) secured to the front of the frame (2).The gear wheel (24) is engaged by a stationary rack (27) and causedthereby to rotate when the box is lifted or lowered. The rotation of thegear wheel is transpivotally secured to the side of the gear wheel asshown at (31), the ratchet (32) forming an integral part of the drum(23) and a spring (33) holding the pawlc'i'n-enga-gement with theratchet.

in operation it will be seen that when the front end of the box islifted the gear wheel will be rotated to'the' right as viewed in Figure2. or to the left as viewed in Figure While rotating in this directionit will not affect the:drun1 and the latter therefore will not begin tounwind its cable until the weight of the sc'aper causes the same toplunge forward. This will happen only afterthe front end of the box hasbeen lifted through a ,consit'lerablc distance. While plunging forwardthe scraper cleans the box of all of its load and the box is thenallowed to fall back to itsoriginal position. lVhile doing this'the gearwheel (24) again en-Y gages the rack'(1i') and iscaused thereby torotate in theopposite direction. that is to the left' as'viewed inFigure 2, and to the right as viewed in Figure "lhis rotary motion istransmitted to the drum by means of the pawl and ratchet arrangementshown in Figure 5. and the drum in winding up the cable pulls thescraper back to its original position.

- In the-device describedhereinabove the support for the scraper isstationary and thescraper itself only cleans the front part of the box,which under'ordinary circumstances is all that is required sinceordinarily the load has a tendency to lodge in the front corners only,the rear end of the box being kept scoured by the constantly passinggravln case,

el. or whatever the load may be. however, it is desired to have thecleaning process extend through the whole box, my modification shown inFigure 2 may be used to advantage. In this form the stationary supports(18) are replaced by a carriage (36) at either end of the rod (LT), thecarriages being adapted to ride on the side members (37) of the box.When constructed like this the scraper is allowed to slide forwardthroughout the length of the box, its forward motion being stopped onlyby lugs (38) secured near the rear end of the box and preventing thecarriages from going too far. The construction of all the other membersof the modification shown in Figure 2 is substantially the same as thatof the device shown in Figure 1, it being nec essary of course toprovide a longer cable and to increase the size of the drum relative tothe size of the gear wheel.

I claim:

.1. Cleaning means for a box adapted to be emptied by the lifting ofoneend, romprising a horizontal plate (o-extensive in .width with thebottom of the box, a vertical member hingedly connected thereto with thehinge lying against the lower edge 'of the box and a pivotal support forthe vertical member allowing the latter and the plate to plunge forwardwhen the end of the box is lifted.

2. Cleaning means for a box adapted to be emptied by the lifting'of oneend, compris-' ing a horizontal plate co-extensive in width with thebottom of the box, a. vertical plate co-cxtensive with the width of thebox hingedly connected thereto with the hinge lying against the loweredge of the box and a pivotal support for the vertical plate al-' lowingboth plates to plunge forward when the end of the box' is lifted.

3. Cleaning means for a box normally dis posed horizontally and adaptedto be emp-" tied by the lifting of one eml,"comprisi1ig scraping meansfor the bottom of the box, a hinged support for the sanie allowing thescraping means to plunge forward when the end of the box is lifted, andmeans'for auto matically returning the' scraping imeans when the boxreturns to a horizontal position.

A et..Cleaning means for a box adapted to be'emptied by the liftingofone end, com prising scraping means forthe bottom of the box, a hingedsupport for the same allowing the scraping means to plunge forward whenthe end of the box is lifted, and' means for automatically returning thescraping means when the box returns to its original position, comprisinga drum supported on the box, a 'cord secured to the scraping means woundon the drum and means for rotating the drum when the box' returnswhereby the scraping means is returned.

5. Cleaning means for a box adapted to be emptied by the lifting of oneend comprising scraping means for the bottom of the box, a hingedsupport for the same al lowing the scraping means to plunge forward whenthe end of the box is lifted, and means for automatically returning thescraping means when the box returns to its original position, comprisinga drum havin a gear wheel associated therewith supported on the box, acord secured to the scraping means wound on the drum and a stationaryrack engaging the gear wheel when the box returns for rotating the drumwhereby the' scraping means is returned.

WILLIAM C. SHEA.

